Android Project Ideas

This guide presents a curated collection of Android projects designed to help developers improve their Android development expertise. The projects are divided into two categories: beginner and advanced. Beginner projects focus on fundamental concepts, such as user input handling, basic UI design, and local storage. Advanced projects tackle more complex challenges, including real-time data synchronization, encryption, native libraries, and machine learning integration.

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BMI Calculator

Project Details: A simple app that asks users for their height and weight, then shows their Body Mass Index. It’s a great way to get familiar with text inputs, buttons, and basic arithmetic in an Android environment.

How to Do:

  • Create a new Android Studio project with an Empty Activity.
  • In the layout, add two EditText fields (one for height, one for weight), a Button, and a TextView for the result.
  • In the Activity’s code, read user input when the button is tapped, convert it to numbers, compute BMI = weight / (height × height), and display the value in the TextView.
  • Add simple validation to ensure inputs aren’t empty or zero.

Features:

  • Input fields for height (meters) and weight (kilograms)
  • Calculate button
  • Display of BMI with two decimal places
  • Error message for invalid or missing input

Key Tools & Libraries:

  • Android SDK (Java)
  • Android Studio UI Designer

Project Source Code: GitHub

Beginner High

Open-Source Android Weather App

Project Details: An app that fetches weather data from the OpenWeatherMap API and displays current conditions plus a short forecast. It follows a Model–View–Presenter pattern to separate the data logic from the user interface.

How to Do:

  • Sign up for a free OpenWeatherMap API key.
  • Set up Retrofit to make HTTP requests and Gson to parse JSON.
  • Build a Presenter class that requests data and passes it to the View (Activity/Fragment).
  • Design layouts for current weather, including an icon, temperature, and description.
  • Handle permissions and network errors with user feedback.

Features:

  • Current weather display (icon, temperature, description)
  • 5-day forecast in a RecyclerView
  • Pull-to-refresh gesture
  • Offline cache of last successful fetch

Key Tools & Libraries:

  • Retrofit
  • Gson
  • MVP architecture
  • AndroidX libraries

Project Source Code: GitHub

Beginner Medium

Tic Tac Toe Game

Project Details: A two-player version of the classic grid game. Users tap on grid cells to place X or O, and the app checks for three-in-a-row wins or a draw.

How to Do:

  • Create a 3×3 GridLayout in XML.
  • Assign click listeners to each cell view.
  • Keep track of the current player and game state in a 2D array.
  • After each move, check rows, columns, and diagonals for a win or full board for a draw.
  • Show a dialog or Toast to announce results and offer a restart.

Features:

  • Tap to place X or O
  • Highlight winning line
  • Draw detection
  • Reset button

Key Tools & Libraries:

  • Android SDK (Java)
  • GridLayout

Project Source Code: GitHub

Beginner High

Expense Tracker App

Project Details: An application for logging expenses and income entries. It stores records locally and shows a summary of spending and earnings over time. This teaches you about persistent storage and data-driven UI.

How to Do:

  • Define an SQLite database or Room entities for transactions (amount, category, date).
  • Create DAO interfaces and a RoomDatabase.
  • Build an Activity with input fields for new entries and a RecyclerView to list past records.
  • Calculate totals and show a pie chart or bar chart of spending per category.
  • Allow users to delete or edit transactions.

Features:

  • Add, edit, delete entries
  • List view of all transactions
  • Summary of total income vs. expenses
  • Chart of category-wise spending

Key Tools & Libraries:

  • Room persistence library
  • LiveData & ViewModel (MVVM)
  • MPAndroidChart

Project Source Code: GitHub

Beginner Medium

Medicine Reminder

Project Details: An app that lets users schedule alarms for taking medication. It triggers notifications at set times and keeps a log of taken doses.

How to Do:

  • Use Room or SharedPreferences to save medicine names and times.
  • Schedule alarms with AlarmManager for each dose time.
  • Implement a BroadcastReceiver to catch alarms and show a notification.
  • Build a UI to add new medicines, set frequency, and view upcoming reminders.
  • Mark doses as taken and record timestamps.

Features:

  • Add multiple medicines with custom schedules
  • Notifications at each dose time
  • Log of when doses were taken
  • Snooze or skip options

Key Tools & Libraries:

  • AlarmManager & BroadcastReceiver
  • Room or SharedPreferences
  • Android Notification API

Project Source Code: GitHub

Beginner Low

Social Media App (ReachMe)

Project Details: A small-scale social network where users can post short updates (“stories”), follow others, and interact through likes and comments. Data is stored in Firebase for real-time updates.

How to Do:

  • Set up Firebase Authentication for user sign-up/sign-in.
  • Use Firebase Realtime Database or Firestore to store posts, likes, and comments.
  • Upload images to Firebase Storage and retrieve URLs.
  • Display feeds in RecyclerViews, updating in real time with listeners.
  • Allow users to follow or unfollow and filter the feed to show only followed users’ posts.

Features:

  • User registration and login
  • Create and view posts with images
  • Like and comment on posts
  • Follow/unfollow users
  • Real-time feed updates

Key Tools & Libraries:

  • Firebase Authentication
  • Firebase Firestore (or Realtime Database)
  • Firebase Storage
  • Glide or Picasso for image loading

Project Source Code: GitHub

Beginner Medium

SociaLite (Official Sample)

Project Details: A sample project by Google demonstrating best practices for Android apps. It shows how to build a feed-based interface with paging, caching, and user profiles, using modern Jetpack libraries.

How to Do:

  • Clone the repo and open it in Android Studio.
  • Study how Paging 3 is used to load pages of posts.
  • Examine Room setup for local caching and Retrofit for network access.
  • Look at ViewModel and LiveData to update the UI.
  • Run the app on an emulator to see feed loading, pull-to-refresh, and profile screens.

Features:

  • Infinite scrolling feed
  • Local cache of posts
  • User profile and detail screens
  • Pull-to-refresh

Key Tools & Libraries:

  • Paging 3
  • Room
  • Retrofit & Moshi
  • LiveData & ViewModel

Project Source Code: GitHub

Beginner Medium

Android-Beginner-Projects Collection

Project Details: A single repository that hosts several starter projects, such as a calculator, quotes app, Pokémon GO style map demo, and a basic e-commerce layout. It’s meant for experimenting with different parts of Android and Kotlin.

How to Do:

  • Fork or clone the repo and open individual modules in Android Studio.
  • Explore each folder (e.g., Calculator, Quotes, MapDemo) to see how layouts and code are organized.
  • Run the modules one by one to observe behavior.
  • Try modifying colors, adding features, or converting Java files to Kotlin.

Features:

  • Simple calculator
  • Quotes display with swipe gesture
  • Map view demo
  • E-commerce product list template

Key Tools & Libraries:

  • Kotlin
  • AndroidX components
  • Google Maps SDK (for map demo)
  • RecyclerView

Project Source Code: GitHub

Beginner Low

Signal Android

Project Details: A private messenger that secures all messages and calls end-to-end. It supports one-to-one and group chats, disappearing messages, file sharing, and HD voice/video calls. Good for learning encryption, real-time data sync, and complex background services.

How to Do:

  • Clone the repo and open in Android Studio.
  • Fetch submodules and let Gradle sync.
  • Configure your debug keystore (or use the provided one) and run on device/emulator.
  • Register a test phone number with the Signal service to exchange encryption keys.
  • Explore the code paths for messaging, media transfer, and call setup.

Features:

  • End-to-end encrypted text, voice, and video
  • Disappearing messages
  • Group chats and file sharing
  • Push notifications via Firebase

Key Tools & Libraries:

  • Kotlin
  • AndroidX
  • libsignal-protocol
  • WebRTC
  • Room

Project Source Code: GitHub

Advanced High

VLC for Android

Project Details: Official Android port of the VLC media player. Plays virtually any audio or video format, supports network streams, and includes a media database for organizing content. Ideal for mastering native libraries and media frameworks.

How to Do:

  • Clone the vlc-android repo and its submodules.
  • Build LibVLC with the NDK (instructions in README).
  • Open the Android project in Android Studio and let Gradle compile both native and Java/Kotlin code.
  • Install on device and test local files plus network streams.

Features:

  • Broad codec and container support
  • Subtitle rendering and track switching
  • Network streaming (HTTP, RTSP, etc.)
  • Audio equalizer and playback speed control
  • Android TV and Chromecast support

Key Tools & Libraries:

  • Kotlin
  • Android NDK
  • LibVLC
  • ExoPlayer integration
  • AndroidX

Project Source Code: GitHub

Advanced High

OsmAnd

Project Details: Offline map and navigation app using OpenStreetMap data. Provides turn-by-turn guidance, custom map styles, GPX track recording, and POI search—all without an internet connection once maps are downloaded.

How to Do:

  • Clone the OsmAnd repo and install required Android SDK/NDK versions.
  • Use the provided repo manifest to sync modules (repo init/repo sync).
  • Open the Gradle project in Android Studio, build, and install.
  • Place OSM map files in the device’s storage for offline use.

Features:

  • Offline routing for car, bike, pedestrian
  • Voice guidance and speed limit warnings
  • Custom rendering styles and day/night switching
  • GPX track import/export
  • POI editing plugin for direct OSM contributions

Key Tools & Libraries:

  • Java
  • C++
  • Android SDK
  • Mapsforge
  • SQLite
  • Gradle

Project Source Code: GitHub

Advanced Medium

StreetComplete

Project Details: An app for contributing to OpenStreetMap through “quests” that ask simple on-site questions (e.g., “Does this stop have a shelter?”). Answers are uploaded directly to OSM, making map editing approachable for newcomers.

How to Do:

  • Clone the StreetComplete repo and open it in Android Studio.
  • Obtain OSM OAuth credentials and configure them in the app.
  • Build and install on device, then grant location and network permissions.
  • Tap on nearby quests, answer questions, and watch edits appear in OSM.

Features:

  • Quest-based editing with minimal OSM knowledge
  • Offline map cache for survey mode
  • Real-time upload of edits
  • Gamified points and leaderboards

Key Tools & Libraries:

  • Kotlin
  • MapLibre SDK
  • OSM API
  • OAuth
  • Android Architecture Components
  • Coroutines

Project Source Code: GitHub

Advanced Medium

Proton Mail for Android

Project Details: Secure email client offering end-to-end encryption, zero-access architecture, and support for calendars and contacts. Built by Proton for privacy-focused communication.

How to Do:

  • Clone the android-mail repo and import into Android Studio.
  • Configure ProtonCore modules and API endpoints in Gradle.
  • Generate or use provided signing keys and run on device.
  • Log in with a Proton Mail account and explore encrypted messaging flows.

Features:

  • End-to-end encrypted email and attachments
  • Push notifications
  • Multi-account support
  • Built-in calendar and contact encryption

Key Tools & Libraries:

  • Kotlin
  • ProtonCore
  • Retrofit
  • Room
  • Dagger

Project Source Code: GitHub

Advanced High

Thunderbird for Android

Project Details: Native email client derived from K-9 Mail. Offers a unified inbox, conversation view, folder management, and PGP integration via OpenKeychain.

How to Do:

  • Clone the thunderbird-android repo and open in Android Studio.
  • Let Gradle download dependencies and sync.
  • Run on emulator or device, then add an IMAP/POP3 account.
  • Install OpenKeychain to enable PGP encryption.

Features:

  • Unified inbox and threaded conversations
  • IMAP/POP3 support with IDLE push
  • PGP encryption and signatures
  • Folder and label management

Key Tools & Libraries:

  • Java
  • Android SDK
  • Apache Commons
  • OpenKeychain integration

Project Source Code: GitHub

Advanced Medium

DuckDuckGo Android

Project Details: Privacy-focused browser and search app. Blocks trackers, forces HTTPS, and clears all tabs and data with a single tap (“fire” button).

How to Do:

  • Clone the duckduckgo/Android repo and run install_tools.sh.
  • Open in Android Studio, let Gradle sync, and build.
  • Install on a device running Android 5.0+ and explore privacy features.

Features:

  • Tracker blocking
  • HTTPS Everywhere
  • Private search with autocomplete
  • Fire button to erase all browsing data
  • Customizable app tabs

Key Tools & Libraries:

  • Kotlin
  • AndroidX
  • WebView
  • Moshi
  • Retrofit
  • Espresso tests

Project Source Code: GitHub

Advanced High

Android TensorFlow Lite Machine Learning Example

Project Details: Demo app for on-device ML tasks: image classification, object detection, and audio recognition using TensorFlow Lite. Shows how to integrate TFLite models and run real-time inference.

How to Do:

  • Clone the repo and open the sample module in Android Studio.
  • Place TFLite model files in the assets folder (or let Gradle fetch them).
  • Grant camera or microphone permissions.
  • Build and run on a device to see live inference results.

Features:

  • Image classification with pre-trained models
  • Real-time object detection
  • Audio classification demo
  • Model quantization examples and performance metrics

Key Tools & Libraries:

  • Java/Kotlin
  • TensorFlow Lite
  • TensorFlow Lite Task Library
  • CameraX

Project Source Code: GitHub

Advanced Medium
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